Grate



UNITED STATES PATENT OFFICE.

STEPHEN LANCESKES, OF LOUISVILLE, KENTUCKY.

GRATE.

SPECIFICATION forming part of Letters Patent No. 439,527', dated October 28, 1890.

Application filed April 14:, 1890. Serial No. 347,836. (No model.)

To all whom it may con/cern:

Be it 'known that I, STEPHEN LANcEsKEs, a citizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Grates; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in furnace-grates of that class which employ a series of bearing or supporting bars and a series of removable grate-bars arranged at right angles to the bearing-bars and resting thereon; and the object of myinvention is to pro` vide an improved gra-te in which the gratebars cannot become displaced or removed from the bearing-bars in cleaning the grate of clinkers, &c., and in which the necessary expansion and con traction of the bearing and grate-bars is provided for.

lVith these ends in view my invention consists in the peculiar construction and arrangement of parts, as will be hereinafter fully described and claimed.

To enable others to more readily understand myinvention, I have illustrated the same in the accompanying drawings, in which- Figure I is a perspective View showing a grate constructed in accordance with my invention. Fig. II is a longitudinal sectional view of the grate, showing a portion of the bridge-wall and front of a furnace in which the grate is situated. Fig. III is a detail view of the grate-bar removed from the furnace, and Fig. IV is an enlarged detail view to show the interlocking device or loose connection between the over-hanging lip and depending hook of the bearing and grate bars.

Like numerals of reference denote corre sponding parts in the several figures of the drawings, referring to whichl designates the bearing-bars, which are arranged in series transversely across a furnace between the front 2 and the bridge-wall 3 of said furnace, and these bearing-bars are arranged parallel with each other and suitably built into the masonry of the furnace or otherwise supported therein. Each bearing-bar furnace, and said fiange or lip extends con- 6c tinuously along the upper edge of the bearing-bar, the upper edge of the vertical web and flange being preferably rounded, while the lower face of the liange or lip is at right angles t-o the vertical face of the web of the bearing-bar.v

8 designates the grate-bar. Aseries of these bars are provided between each pair or adjoining bearing-bars, and these grate-bars span the space between the bearing-bars and rest thereon, the grate-bars being of such length as to rest on the upper edges of the webs of two adjoining bars. Each grate-bar is sinuous or fluted transversely to the length of the same, and as distinguished from prior grate-bars having the lateral faces only of the bar formed with ridges or corrugations my improved bar is made with sinuous or wavy lines in the body thereof. At the front end each grate-bar has a reduced tang 9, while the opposite or rear end of said grate-bar has a depending hook l0, formed on the tang l1 thereof, said tangs 9 ll of the grate-bar projecting from the upper part of said bar, whereby the tangs are adapted to rest on the upper edges of two adjoining bearing-bars, and the body of the grate-bars depends into the space between said bearing-bars, as clearly.

shown in Fig. II of the drawings. The hook lO at the rear end of each grate-bar consists of a vertical part and a horizontal part at right angles to said vertical part, and this hook laps over and takes beneath the overhanging lip at the rear side or face of the bridge-wall to prevent the grate-bar from becoming displaced on or disconnected from the bearingbar. The tang 9 at the front of the gratebar has two flanges or lugs l2 13 on the lateral faces thereof, one flange being on one face and the other flange being on the reverse face of said tang, and these flanges project or extend beyond the plane of the tang for a IOO suitable distance. The flanges or lugs are reclined reversely to each other, and they serve to properly space the grate-bars with lateral relationto each other when the grate is built up of the grate-bars. The front ends of the first series of grate-bars have the tangs 9, resting on a support provided on the furnace-front 2, While the rear ends of the first series of grate-bars rest on the irst bearing- Io bar 1, with their depending hooks fitting over and beneath the iiange 6 of said bearing-bar 1. The second series of grate-bars rest on the first and second bearing-bars 1 1,the second series of grate-bars having the front tangs 9 arranged on opposite sides of the first series of grate-bars and with the lateral iian ges 12 13 in contact with the rear tangs 10 of the first series of grate-bars to maintain the gratebars in proper relation to each other. zo My improved grate can be easily and readily built up within a furnace, and the grate-bars are connected to hold themselves in position against lateral and vertical displacement, which is advantageous, especially when clean- 2 5 ing the grate of clinkers, &c.

The grate and bearing bars are not im movably connected together by the rearward facing-flange 6 and depending hook 10, but the parts are loosely fitted together, so as to al- 3o low a slight play wit-hout liability to become separated, whereby expansion and contraction of the grate and bearing bars is compensated.

3 5 struction, cheap of manufacture, and the bars can be easily removed when worn out and replaced at a trifling outlay, which advantages are very desirable in a furnacegrate.

I am aware of Patent N o. 111,031 for a sec- 4o tional grate-bar comprising upper and lower sections arranged parallel with each other and connected togetherv at the ends by an expansion-joint; but such is not my invention. ,My improved grate is differentiated from the grate-bar shown and described in said patent in that I provide a bearing-bar which is arranged below the grate-bars proper, and which bearing-bar is common to all the gratebars of the series, each grate-bar being made 5o in a single casting and provided at its ends with downwardly-extending tangs to engage a iiange on the bearing-bar, whereby the gratebais proper constitute the entire fuel-bearing surface, and the construction of the grate as an entirety is materially simplified and its cost of manufacture reduced.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a grate, the combination of the series 6o of parallel bearing-bars, which are common to the whole series of grate-bars and arranged transversely below said grate-bars, each bearing-bar having the continuous overhanging I'iange 6 projecting outwardly from the ver- 65 tical web thereof at the upper edge of said web, and the series of parallel grate-bars separate from the bearingbars and arranged at right angles to the same, each grate-bar being provided at both ends with the tangs, 7o which rest on the upper edge of the bearingbars, the tangs of each grate-bar having the integral depending hooks 10, which take beneath the overhanging flange G on the bearing-bar, whereby the grate-bars are held from endwise displacement on the bearing-bars and expansion and contraction between the iiange of the bearing-bars and hooks of t-he grate-bars are provided for, substantially as described. 8c

2. In a grate, the combination of the series of parallel bearing-bars, which are common to the whole series of grate-bars and arranged transversely below said grate-bars, eachbearing-bar having the continuous longitudinal k flange 6 at the upper edge of the vertical web l thereof, and a series of grate-bars separate The grate 1s simple and durable in confrom the bearing-bars and arranged at right I angles to the saine, each grate-bar being provided at both ends with the projecting tangs 9o which rest on the bearing-bars, the rear tang of each grate-bar having the integral depending hooks 10, which overlap and take loosely beneath. the flange of the bearing-bar, and `the front tang of each grate-bar having the `laterally-extending lugs or ii-ange 12 13, arlranged to contact with the contiguous ends of two adjoining grate-bars to properly space or separate the grate-bars from each other, substantially as described, for the purpose roo set forth.

In testimony whereof Iaffix my signature in presence of two witnesses.

STEPHEN LANCESKES. 

